Adsorption analysis for high moisture content coal in mixed gas
Abstract：Through the isothermal adsorption experiments under high pressure of the coal sample with high wa- ter content and the mixed gas （CH4, CO： and N2 each take up 33.3% ） , we got the isothermal adsorption curve, and analyzed change law of each gas in the adsorption process. The result shows that： ① The adsorp- tion curve does not follow the existing regularity that the curve donot change anymore when the water content of coal sample is 5% higher than balance moisture scope, but becomes much lower. ② The volume percentage of each gas changes in real time, wheve the rate of adsorption is fast fivstly and thenshow for the gas with strong adsorptive capacity, but slow firstly and then fast for the gas with weak adsorptive capacity. ③ There is no evident change in adsorption curve under high pressure. The work can provide dependable reference for proceeding gas injection experiments and replacement experiments, calculate the coalbed methane （CBM） re- sources more scientifically, improve the recovery ratio and, reflect the recoverable potential of CBM.
Keywords：isothermal adsorptioncoalbed methanemixed gasadsorptive capacity
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 136-139 )